Solve for x.
7x= -21
Simplify your answer as much as possible.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

How to solve a simultaneous equation involved with fractions?

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =